diff --git a/fs/fs_context.c b/fs/fs_context.c
index 5e2c3aba1dd8..2bd652b6e848 100644
--- a/fs/fs_context.c
+++ b/fs/fs_context.c
@@ -69,6 +69,9 @@ static struct fs_context *alloc_fs_context(struct file_system_type *fs_type,
 	case FS_CONTEXT_FOR_MOUNT:
 		fc->user_ns = get_user_ns(fc->cred->user_ns);
 		break;
+	case FS_CONTEXT_FOR_SUBMOUNT:
+		fc->user_ns = get_user_ns(reference->d_sb->s_user_ns);
+		break;
 	case FS_CONTEXT_FOR_RECONFIGURE:
 		/* We don't pin any namespaces as the superblock's
 		 * subscriptions cannot be changed at this point.
@@ -106,6 +109,13 @@ struct fs_context *fs_context_for_reconfigure(struct dentry *dentry,
 }
 EXPORT_SYMBOL(fs_context_for_reconfigure);
 
+struct fs_context *fs_context_for_submount(struct file_system_type *type,
+					   struct dentry *reference)
+{
+	return alloc_fs_context(type, reference, 0, 0, FS_CONTEXT_FOR_SUBMOUNT);
+}
+EXPORT_SYMBOL(fs_context_for_submount);
+
 void fc_drop_locked(struct fs_context *fc)
 {
 	struct super_block *sb = fc->root->d_sb;
diff --git a/include/linux/fs_context.h b/include/linux/fs_context.h
index 98772f882a3e..7feb018c7a9e 100644
--- a/include/linux/fs_context.h
+++ b/include/linux/fs_context.h
@@ -25,6 +25,7 @@ struct user_namespace;
 
 enum fs_context_purpose {
 	FS_CONTEXT_FOR_MOUNT,		/* New superblock for explicit mount */
+	FS_CONTEXT_FOR_SUBMOUNT,	/* New superblock for automatic submount */
 	FS_CONTEXT_FOR_RECONFIGURE,	/* Superblock reconfiguration (remount) */
 };
 
@@ -61,6 +62,8 @@ extern struct fs_context *fs_context_for_mount(struct file_system_type *fs_type,
 extern struct fs_context *fs_context_for_reconfigure(struct dentry *dentry,
 						unsigned int sb_flags,
 						unsigned int sb_flags_mask);
+extern struct fs_context *fs_context_for_submount(struct file_system_type *fs_type,
+						struct dentry *reference);
 
 extern int vfs_get_tree(struct fs_context *fc);
 extern void put_fs_context(struct fs_context *fc);